Thin Flakes with Different Polymorph Crystalline Phases*

The novel intrinsic topological superconductor 2M Phase Tungsten Disulfide (2M WS₂) opens new opportunities for the confirmation of the Majorana Zero Mode (MZM) presence and behavior. The topologically protected MZM quantum state could overcome issues such as decoherence and noise in quantum computations. 2M WS₂ has a high superconducting transition temperature of 8.8 K, providing an excellent material to explore the novel properties of the MZMs. To-date, most of the synthesis methods of 2M WS₂ involve a de-intercalation process to induce the 2M phase. Multiple polymorph crystalline phases can be present in the materials. In this work, by using Scanning Tunneling Microscopy and spectroscopy (STM/S), we have observed unique Moiré Patterns formed between the 2M phase and a hexagonal phase. Additionally, we find an apparent crystalline phase mixing regime where the surface layer consists of the 2M and hexagonal phase intermixed in a quasi-periodic manner.